WorksheetsBIOL 1306 Unit 4: Interactive Cells
Total questions: 15
Worksheet time: 8mins
Looking at the scale shown here, how many times larger would a bacterium with a diameter of 10 µm be than a molecule with a diameter of 1 nm?
4
10
100 (10^2)
1,000 (10^3)
10,000 (10^4)
How would the surface area-to-volume ratio of eight 1-mm cubes compare to the surface area-to-volume ratio of one 2-mm cube? (See diagram shown.)
They would be equal.
The 2-mm cube would have a greater surface area-to-volume ratio.
The 1-mm cubes would have a greater surface area-to-volume ratio.
The 2-mm cube would have a greater surface area; the 1-mm cubes would have a greater volume.
Cannot determine with the information provided.
This figure depicts cell structures being separated from one another on the basis of size and density. Which of the following choices correctly indicates the order in which certain plant cell structures would be found from top (blue) to bottom (purple)?
Chloroplasts (blue), nuclei (yellow), endoplasmic reticulum (purple)
Golgi (blue), chloroplasts (yellow), ribosomes (purple)
Nuclei (blue), mitochondria (yellow), lysosomes (purple)
Ribosomes (blue), chloroplasts (yellow), nuclei (purple)
Mitochondria (blue), ribosomes (yellow), golgi (purple)
In the diagram of the prokaryotic cell shown, the region labeled 1 is called the _______.
nucleoid
cytoplasm
capsule
plasma membrane
ribosome
In the following figure, the leaders are pointing to the _______, a structure involved in _______.
cell wall; cell protection
flagella; cell movement
cilia; exchange of genetic material
cytoskeleton; maintaining cell shape
internal membrane; energy conversion
Which one of the structures listed here can be found in eukaryotic plant cells but not in prokaryotic cells?
Cell Walls
Ribosomes
Internal membranes
Cytosol
Glyoxysomes
Which of the following correctly pairs a eukaryotic cell structure with its function?
Ribosomes: synthesis of lipids and steroids
Nucleolus: assembly of ribosomes from RNA and protein
Vacuole: where stored lipids are converted into carbohydrates
Peroxisome: site of macromolecule hydrolysis
Mitochondrion: synthesis of polysaccharides for the plant cell wall
A researcher is able to fluorescently label some newly synthesized membrane within a cell. Which of the following correctly lists the order in which this newly synthesized membrane moves through the endomembrane system?
Rough ER, smooth ER, Golgi, plasma membrane
Smooth ER, rough ER, Golgi, plasma membrane
Golgi, smooth ER, rough ER, plasma membrane
Plasma membrane, smooth ER, rough ER, Golgi
Golgi, rough ER, smooth ER, plasma membrane
Use your knowledge of eukaryotic cell components and their functions to identify the genetic disease described here that is most likely to affect lysosomes.
Congenital disorders of glycosylation (CDGs) Type II—includes defects in genes that code for enzymes that make the carbohydrate part of glycoproteins. Symptoms vary depending on the specific enzyme affected.
Cystic fibrosis—a genetic disease caused by a mutation in a gene for an ion channel protein that is important in making cell secretions like sweat and mucus.
Acatalasia—a disorder in which no catalase is made. This enzyme catalyzes reactions that produce hydrogen peroxide. Acatalasia symptoms include increased periodontal infections.
Gaucher’s disease—a defective gene prevents formation of an enzyme important in the recycling of worn-out cells. In the absence of this enzyme, the lipid glucocerebroside accumulates, causing enlargement of the spleen, liver, and bone marrow.
Leber’s hereditary optical neuropathy (LHON)—a genetic disease caused by defects in genes that code for polypeptides in a membrane-embedded protein complex important in energy metabolism. Symptoms include loss of central vision.
Consider the transmission electron micrograph (EM) shown here. Which of the following statements about this EM is true?
The organelle shown is a mitochondrion; the arrow points to a crista.
The organelle shown is a chloroplast; the arrow points to the stroma.
The organelle shown is the Golgi apparatus; the arrow points to a cisterna.
The structure shown is endoplasmic reticulum (ER); the arrow points to rough ER
The organelle shown is the nucleus; the arrow points to the nuclear envelope.
The _______, a cytoskeletal protein pictured here, functions as a rigid framework along which motor proteins composed of _______ can move.
intermediate filament; keratin
microtubule; myosin
microfilament; actin
microtubule; dynein
flagella; actin
As the motor protein _______ keeps changing shape (powered by ATP), the microtubule doublets will _______.
myosin; keep sliding past each other
dynein; bend together
dynein; keep sliding past each other
kinesin; keep sliding past each other
kinesin; bend together
Which of the following would have been the most logical conclusion if the researchers had seen an equal proportion of cells round up and stop moving in the cytochalasin B and in the control group in repeated experiments?
Microfilaments of the cytoskeleton are essential for amoeboid cell movement.
Cytochalasin B causes the Amoeba to round up and cease movement.
The control injection must be contaminated with cytochalasin B.
Cytochalasin B does not affect Amoeba.
The injection process appears to cause the Amoeba to round up and cease movement.
The accompanying figure depicts the structure of the extracellular matrix found in the basal lamina of endothelial cells. Which of the following statements regarding the function of the extracellular matrix is true?
The extracellular matrix helps filter materials passing between tissues.
The extracellular matrix plays an important role in the digestion of cell wastes.
The extracellular matrix contains motor proteins that help cilia move.
The extracellular matrix prevents dissolved materials from moving between cells.
The extracellular matrix is found in abundance in all tissues of the body.
Which of the following is a function of animal tight junctions (shown)?
Facilitating communication between cells
Forcing substances to pass through epithelial cell membranes rather than intercellular spaces
Providing a mechanism for transmission of electric signals between cells
Providing mechanical stability via a direct link to cytoskeleton filaments
Allowing passage of dissolved molecules between cells
